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4 of History’s Strangest Scientific Theories

Throughout the entirety of human history, we’ve strived continuously to understand the world—to come up with plausible explanations for natural phenomena that we may not fully grasp. Alas, as some of history’s strangest scientific theories demonstrate, we don’t always get it right. In fact, we’re frequently so wrong that many of these now-obsolete theories edge into outright absurdity.